Positives:
+ The device is very light and handy (+ is practically the integrated charging cable
+ The charging time of the Power Bank is fully discharged after about two hours
+ The Samsung Galaxy S5 I could recharge up to almost 100%
+ Processing operates stable
Negatives:
To date, nothing - but only very briefly in use.
Conclusion: I have compared many products on weight and performance: This product is the ideal trade-off between weight and performance. The Power Bank is perfect for a long day at work or a trip, since experience shows that a smart phone with intensive use a full day "did not survive - and what makes for such use a Power Bank beyond the 5,000 mAh, which lies like a log in his pocket?